Comparison of Intraseasonal Variation of the East Asian Summer Monsoon between El Niño Developing Years and La Niña Years

Feng XUE; Xinyu DUAN; Tonghua SU

doi:10.3878/j.issn.1006-9585.2017.17044

Volume 23 Issue 3

Turn off MathJax

Article Contents

Article Navigation > Climatic and Environmental Research > 2018 > 23(3): 321-331

Feng XUE, Xinyu DUAN, Tonghua SU. Comparison of Intraseasonal Variation of the East Asian Summer Monsoon between El Niño Developing Years and La Niña Years[J]. Climatic and Environmental Research, 2018, 23(3): 321-331. doi: 10.3878/j.issn.1006-9585.2017.17044

Citation:

Feng XUE, Xinyu DUAN, Tonghua SU. Comparison of Intraseasonal Variation of the East Asian Summer Monsoon between El Niño Developing Years and La Niña Years[J]. Climatic and Environmental Research, 2018, 23(3): 321-331. doi: 10.3878/j.issn.1006-9585.2017.17044

Citation:

PDF( 1837 KB)

Comparison of Intraseasonal Variation of the East Asian Summer Monsoon between El Niño Developing Years and La Niña Years

doi: 10.3878/j.issn.1006-9585.2017.17044

Feng XUE^1
,,
Xinyu DUAN^{1, 2},
Tonghua SU³

1.
International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
2.
University of Chinese Academy of Sciences, Beijing 100049
3.
Fujian Meteorological Observatory, Fuzhou 350001

Funds:

National Natural Science Foundation of China 41475052

National Natural Science Foundation of China 41405056

Received Date: 2017-03-17
Available Online: 2017-07-13
Publish Date: 2018-05-20

Abstract

Abstract

Based on various reanalysis datasets during 1979-2013, we compare the intraseasonal variation of the East Asian summer monsoon (EASM) between El Niño developing years and La Niña years. It is shown that the EASM exhibits different features in the intraseasonal variation under the two situations. During the early summer of El Niño developing years, there exist weak northerly anomalies in the high latitudes, which induce negative geopotential height anomalies over East Asian and a slightly eastward retreat of the western Pacific subtropical high (WPSH). During the late summer, a cyclonic anomaly is induced in the subtropical western Pacific with enhanced convection in the central Pacific due to El Niño forcing. As a result, geopotential height reduces significantly and the WPSH tends to retreat eastward remarkably. In La Niña years, however, the warm pool convection in the summer clearly enhances due to warmer sea surface temperature in the western Pacific in the spring. Accordingly, geopotential height reduces and the WPSH tends to retreat eastward. Besides, the intraseasonal variation of the East Asian summer monsoon exhibits complicated characters in La Niña years with the strongest anomaly occurring in July and relatively weak anomaly occurring in June and August. Although the summer mean WPSH in El Niño developing years is somewhat similar to that in La Niña years, there is a significant discrepancy in the intraseasonal variation. More importantly, the physical mechanisms for the intraseasonal variation are completely different.
- East Asian summer monsoon,
- Western Pacific subtropical high,
- Intraseasonal variation,
- El Niño developing year,
- La Niña year

FullText(HTML)

References(26)

References

[1]	符淙斌, 滕星林. 1988.我国夏季的气候异常与埃尔尼诺/南方涛动现象的关系[J].大气科学, 12 (S1):133-141. doi: 10.3878/j.issn.1006-9895.1988.t1.11 Fu Congbin, Teng Xinglin. 1988. Climate anomalies in China associated with El Niño/southern Oscillation[J]. Chinese Journal of Atmospheric Sciences (in Chinese), 12 (S1):133-141, doi: 10.3878/j.issn.1006-9895.1988.t1.11.
[2]	Gill A E. 1980. Some simple solutions for heat-induced tropical circulation[J]. Quart. J. Roy. Meteor. Soc., 106:447-462, doi:10.1002/qj. 49710644905.
[3]	Huang R H, Wu Y F. 1989. The influence of ENSO on the summer climate change in China and its mechanism[J]. Advances in Atmospheric Sciences, 6 (1):21-32, doi: 10.1007/BF02656915.
[4]	Huffman G J, Adler R F, Arkin P, et al. 1997. The global precipitation climatology project (GPCP) combined precipitation dataset[J]. Bull. Amer. Meteor. Soc., 78 (1):5-20, doi:10.1175/1520-0477(1997)078<0005:TGPCPG>2.0.CO;2.
[5]	Kanamitsu M, Ebisuzaki W, Woollen J, et al. 2002. NCEP-DOE AMIP-Ⅱ reanalysis (R-2)[J]. Bull. Amer. Meteor. Soc., 83:1631-1644, doi:10. 1175/BAMS-83-11-1631.
[6]	Kawatani Y, Ninomiya K, Tokioka T. 2008. The North Pacic subtropical high characterized separately for June, July, and August:Zonal displacement associated with submonthly variability[J]. J. Meteor. Soc. Japan, 86 (4):505-530, doi: 10.2151/jmsj.86.505.
[7]	Lau N C, Nath M J. 2000. Impact of ENSO on the variability of the Asian-Australian monsoons as simulated in GCM experiments[J]. J. Climate, 13:4287-4309, doi:10.1175/1520-0442(2000)013<4287:IOEOTV>2.0.CO;2.
[8]	Liebmann B, Smith C A. 1996. Description of a complete (interpolated) outgoing longwave radiation dataset[J]. Bull. Amer. Meteor. Soc., 77:1275-1277. http://citeseerx.ist.psu.edu/showciting?cid=2773917
[9]	刘长征, 薛峰. 2010a.不同强度El Niño的衰减过程. Ⅰ, 强El Niño的衰减过程[J].地球物理学报, 53 (1):39-48. doi: 10.3969/j.issn.0001-5733.2010.01.005 Liu Changzheng, Xue Feng. 2010a. The decay of El Niño with different intensity. Part Ⅰ, the decay of the strong El Niño[J]. Chinese Journal of Geophysics (in Chinese), 53 (1):39-48, doi: 10.3969/j.issn.0001-5733.2010.01.005.
[10]	刘长征, 薛峰. 2010b.不同强度El Niño的衰减过程. Ⅱ, 中等和较弱El Niño的衰减过程[J].地球物理学报, 53 (11):2564-2573. doi: 10.3969/j.issn.0001-5733.2010.11.004 Liu Changzheng, Xue Feng. 2010b. The decay of El Niño with different intensity. Part Ⅱ, the decay of the moderate and relatively-weak El Niño[J]. Chinese Journal of Geophysics (in Chinese), 53 (11):2564-2573, doi: 10.3969/j.issn.0001-5733.2010.11.004.
[11]	Nitta T. 1987. Convective activities in the tropical western pacific and their impact on the northern hemisphere summer circulation[J]. J. Meteor. Soc. Japan, 65 (3):373-390. doi: 10.2151/jmsj1965.65.3_373
[12]	Okumura Y M, Deser C. 2010. Asymmetry in the duration of El Niño and La Niña[J]. J. Climate, 23:5826-5843, doi: 10.1175/2010JCLI3592.1.
[13]	Smith T M, Reynolds R W, Peterson T C, et al. 2008. Improvements to NOAA's historical merged land-ocean surface temperature analysis (1880-2006)[J]. J. Climate, 21:2283-2296, doi:10.1175/2007JCLI2100. 1.
[14]	苏同华, 薛峰. 2010.东亚夏季风环流和雨带的季节内变化[J].大气科学, 34 (3):611-628. doi: 10.3878/j.issn.1006-9895.2010.03.13 Su Tonghua, Xue Feng. 2010. The intraseasonal variation of summer monsoon circulation and rainfall in East Asia[J]. Chinese Journal of Atmospheric Science (in Chinese), 34 (3):611-628, doi: 10.3878/j.issn.1006-9895.2010.03.13.
[15]	Su T H, Xue F. 2011. Two northward jumps of the summertime western Pacific subtropical high and their associations with the tropical SST anomalies[J]. Atmospheric and Oceanic Science Letters, 4 (2):98-102, doi: 10.1080/16742834.2011.11446910.
[16]	陶诗言, 张庆云, 张顺利. 1998. 1998年长江流域洪涝灾害的气候背景和大尺度环流条件[J].气候与环境研究, 3 (4):290-299. doi: 10.3878/j.issn.1006-9585.1998.04.01 Tao Shiyan, Zhang Qingyun, Zhang Shunli. 1998. The great floods in the Changjiang River valley in 1998[J]. Climatic and Environmental Research (in Chinese), 3 (4):290-299, doi: 10.3878/j.issn.1006-9585.1998.04.01.
[17]	Trenberth K E. 1997. The definition of El Niño[J]. Bull. Amer. Meteor. Soc., 78:2771-2777, doi:10.1175/1520-0477(1997)078<2771:TDOENO>2.0.CO;2.
[18]	Xiang B Q, Wang B, Yu W D, et al. 2013. How can anomalous western North Pacific subtropical high intensify in late summer?[J]. Geophys. Res. Lett., 40:2349-2354, doi: 10.1002/grl.50431.
[19]	薛峰. 2008.强La Niña背景下的东亚夏季风异常与1989年和1999年中国夏季降水的对比分析[J].大气科学, 32 (3):423-431. doi: 10.3878/j.issn.1006-9895.2008.03.01 Xue Feng. 2008. East Asian summer monsoon anomalies in strong La Niña years and comparison of summer precipitation in China between 1989 and 1999[J]. Chinese Journal of Atmospheric Sciences (in Chinese), 32 (3):423-431, doi: 10.3878/j.issn.1006-9895.2008.03.01.
[20]	薛峰, 刘长征. 2007.中等强度ENSO对中国东部夏季降水的影响及其与强ENSO的对比分析[J].科学通报, 52 (23):2798-2805. doi: 10.3321/j.issn:0023-074x.2007.23.017
[21]	Xue Feng, Liu Changzheng. 2008. The influence of moderate ENSO on summer rainfall in eastern China and its comparison with strong ENSO[J]. Chinese Science Bulletin, 53 (5):791-800, doi:10.3321/j.issn:0023-074x. 2007.23.017.
[22]	Xue F, Fan F X. 2016. Anomalous western Pacific subtropical high during late summer in weak La Niña years:Contrast between 1981 and 2013[J]. Advances in Atmospheric Sciences, 33 (12):1351-1360, doi: 10.1007/s00376-016-5281-1.
[23]	Xue F, Zhao J J. 2017. Intraseasonal variation of the East Asian summer monsoon in La Niña years[J]. Atmospheric and Oceanic Science Letters, 10 (2):156-161, doi: 10.1080/16742834.2016.1254008.
[24]	Xue F, Zeng Q C, Huang R H, et al. 2015. Recent advances in monsoon studies in China[J]. Advances in Atmospheric Sciences, 32 (2):206-229, doi: 10.1007/s00376-014-0015-8.
[25]	曾庆存, 张东凌, 张铭, 等. 2005.大气环流的季节突变与季风的建立Ⅰ.基本理论方法和气候场分析[J].气候与环境研究, 10 (3):285-302. doi: 10.3969/j.issn.1006-9585.2005.03.003 Zeng Qingcun, Zhang Dongling, Zhang Ming, et al. 2005. The abrupt seasonal transitions in the atmospheric general circulation and the onset of monsoons Part Ⅰ:Basic theoretical method and its application to the analysis of climatological mean observations[J]. Climatic and Environmental Research (in Chinese), 10 (3):285-302, doi:10.3969/j.issn. 1006-9585.2005.03.003.
[26]	赵俊杰, 薛峰, 林万涛, 等. 2016. El Niño对东亚夏季风和夏季降水季节内变化的影响[J].气候与环境研究, 21 (6):678-686. doi: 10.3878/j.issn.1006-9585.2016.15244 Zhao Junjie, Xue Feng, Lin Wantao, et al. 2016. The El Niño influence on intra-seasonal variations of East Asian summer monsoon and summer rainfall[J]. Climatic and Environmental Research (in Chinese), 21 (6):678-686, doi: 10.3878/j.issn.1006-9585.2016.15244.